问题
选择题
The prices _____ up all the time and no one knows when it will become stable. [ ]
A. had gone
B. have been going
C. have gone
D. had been going
答案
答案：B
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The prices _____ up all the time and no one knows when it will become stable. [ ]
A. had gone
B. have been going
C. have gone
D. had been going
答案：B